You conjure 1d4 + your spell casting modifier of goats, these goats have kegs of gunpowder tied to their backs with rope. These goats are tied together, with rope, in a line ( like a train). As a bonus action you can command the front goat to move, and the other goats will follow it accordingly. Or as a bonus action, you can command one of the goats that you can see to detonate , making a explosion that will cause the other gunpowder kegs to explode also. Any creature within 5ft of one the kegs must make a DEX save against your spell casting modifier. The creature takes 8d8 fire damage (for each keg the creature is near), or any creature standing 10ft away takes only 4d8 fire damage (per keg) on a failed save or half as much on a success. The explosions deal double damage to buildings, and constructions, as if it had the siege monster ability.
Any scraps from the goats (such as blood), or the kegs (such as splinters of wood), disappear once the spell's duration ends.
The ropes have AC15 and HP5. And immunity to bludgeoning damage.
The kegs have no opening.
The goats have the same stats as a mule. (*phb page 307*)
*This what they get for messing with my reality* -Atwood, the druid
* - (A pound of gunpowder, and a goats horn.)